Couch-roll.



PATENTBD SEPT. 26, 1905.

B. B. FARNHAM.

00mm ROLL.

APPLICATION FILED MAR. 20, 1905.

.I;LI,I.HIHIHII1 IIIIJHIIIIII'IHIIH Z HlllllllllllHHIIHl'llllllllHllHl UNITED STATES PATENT OFFICE.

I .BI ON B. FARNHAM, OF CASWITFTON, NEW YORK.

COUCH-ROLL.

Specification of Letters Patent.

Patented Sept. 26, 1905.

Application filed March 20, 1905. Serial No. 250,910.

Too, whom it may concern:

form evenness and softness, will absorb themoisture quickly, withstand the constant pressure carried on it, and possess sufiicient resiliency to resume a perfectly circular shape when at rest or the pressure is removed. 1 attain these objects by constructing the couchroll as shown in the accompanying drawings, in which v Figure 1 is a perspective view of aroll before it is covered with the absorbent material and shows how the absorbent material is attached. Fig. 2 is a cross-section of. a roll complete. the same.

Similar letters refer to similar parts throughout the several views.

A is the shaft of a couch-roll. B is the hub of the roll, and C O are spokes extending from the hub tothe rim. D is the rim ofthe roll, the whole making what is known as a spider. The spider is preferably made of iron and the periphery having flat sides, as shown in Fig.

Upon the periphery of the spider are placed wooden staves E E,'which are fastened to the rim D of the spider by means of bolts or screws F F. The staves are not placed solid against each other, but small spaces left between, as shown in Fig. 2, to allow forexpansion and contraction. When the staves are secured in position, they are turned in a lathe, so as to make the roll perfectly round with a smooth surface.

End pieces G G are placed on the ends of the roll, having shoulders ff to fit over the ends of the staves E and also extending slightly beyond the periphery of the roll, so as to form some lateral support for the absorbent material with which the roll is covered. The ab.- sorbent material is formed by taking strips of felt or similar material of a width equal to Y the desired thickness for the covering of the roll and rolling each strip by itself into a small roll of an inch, more or less, in diameter Fig. 8 is a longitudinal sectionof and toe-nailing the rolls thus formed upon the wooden periphery of the roll already ,constructed close together, as shown in Fig. 1, and covering the entire roll in this way, as shown in Figs. 2 and 3. The end plates G may be made to fit tightly upon the shaft A, so that .the drum of the roll may be filled with water to make the roll heavier, when desired. When the wooden staves of the roll are completely covered with the absorbent material, as described, the roll is then placed in a lathe and the outer edges of the absorbent material sawed smooth, so that the entire absorbent material will be of a uniform thickness and present a homogeneous surface. Made in this way the covering ofthe roll will absorb moisture quickly-and will be able to withstand the constant pressure carried by it. It will also have resiliency to resume its perfectly circul'ar shape when at rest and the pressure is removed. The rolls will thus be firm and elastic and will not mat or harden in spots, and the surface will always maintain uniform even-' ness and softness, and the wear on the rolls will be evenly distributed over the entire surface, and the rolls will be perfectly true and bear accurately upon the forming sheets.

What'I claim as my invention, and desire to secure by Letters Patent, is

1. In a paper-making machine, a couch-roll consisting of a shaft; a spider mounted upon said shaft; a water-tight rim mounted upon the spokes of said spider; wooden staves attachedlengthwiseupon said rim; water-tight end plates on said roll, adapted to form a water-tight compartment within said roll; rolls of absorbent material attached endwise upon said staves, substantially as described.

2. In a paper-making machine; a couch-roll, consisting of a shaft; a spider mounted on said shaft; wooden staves attached lengthwise upon the rim of said spider; said staves not being in contact with each other; end plates on said roll, having shoulders adapted to fit over the ends of said staves and to extend a short distance beyond the surface of said staves; rolls of absorbent material attached endwise upon said staves, substantially as described and for the purposes set forth.

Signed at Albany, New York, this 17th day of March, 1905;

BION B. FARNHAM. Witnesses:

LOTTIE PRIOR, WALTER E. WARD. 

